Originally Posted by
767400
Are the JR pass and the Suica and NEX combo different items? Do both of these need to be validated?
Yes, the JR rail pass and the Suica/N'Ex combo are completely different. The JR rail pass needs to be validated; Suica/N'Ex cannot be purchased overseas so there is no validation process.
Originally Posted by
767400
Once I arrive in NRT and clear customs I go to the JR East ticket office. Do I need to fill out an application to get this combo pass? I was reading somewhere you need your passport, railpass order then application form...

Is all that needed for NEX combo?
The rail pass order receipt is only if you purchased the JR rail pass. If you are purchasing Suica/N'Ex, there is no application or order receipt. You do need to present your passport though (as Suica/N'Ex is only available for foreigners).
Originally Posted by
767400
I will be arriving on CO7 around 14:30. I also saw that not all JR offices were open at that time? They had morning and evening hours.
As you are flying in on CO, you will be arriving in Terminal 1.
The JR travel center is across from the ticket gates at the JR Terminal 1 station and is open from 8:15 to 7pm, so you shouldn't have any problems.
Complete details about the Suica/N'Ex package can be found here.